Having examined the Federal Aviation Administration's (FAA) current program for providing field training to developmental and full-performance-level air traffic controllers, the General Accounting Office (GAO) recommends ensuring that FAA and contractor personnel are providing training consistently and uniformly. Further changes needed to ensure quality and consistency in FAA's new on-the-job training program are the following: (1) a limitation on the number of instructors working with each developmental controller; (2) standardization of the process used to certify controllers on operating positions; (3) specification of a minimum amount of time for refresher training; (4) enhancing methods used for refresher training, perhaps by increasing the use of videotapes and enhanced computer-based instruction; and (5) ensuring that facilities are providing required refresher training on backup systems. In addition, the GAO recommends that the U.S. Secretary of Transportation, in order to improve the oversight of field training, direct the FAA to establish milestones to ensure the timely development of the training tracking system and to evaluate contractor performance. (CML)